Portion of radio base station



FIG. 1 is a front, left side, bottom perspective view of a portion of radio ease station showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a rear, right side, top perspective view thereof.

The portions depicted by broken lines are for illustrative purpose only and form no part of the claimed design.

The long and short dashed lines illustrate a boundary of claimed design and unclaimed ones. 

CLAIM The ornamental design for a portion of radio base station, as shown and described. 